Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
76,722 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 GMC Envoy engine problems

engine problem

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2004 GMC Envoy Owner Comments

problem #11

Sep 132008


  • 80,000 miles


After driving vehicle tends to lunge forward even after brakes are stepped on or after parked at a red light, in the first case driving at highway speeds, the speedometer freezes and hangs, during this occurrence we do not know what speed limit we are going which is scary and a safety concern especially with children in the car, to troubleshoot the problem and bring speedometer down to zero mph, the car would need to be turned on and off numerous times to set back to zero

- Dallas, TX, USA

problem #10

Mar 272015


  • 149,000 miles
The cruise control is intermittent.

- Toledo, OH, USA

problem #9

Jul 062009

Envoy 4WD 8-cyl

  • 85,000 miles
Speedometer is completely disabled, RPM and battery guages inoperable and gas guage sometimes does not work. I understand there was a recall but I did not receive any notification and now I am told it will cost between $400 and $500 to repair.

- Elk Grove, CA, USA

problem #8

Jun 272010


  • 192,000 miles


While traveling at highway speeds with a 2004 Envoy the instrument cluster displays the wrong speed and showing a significantly lower speed or becoming "stuck" showing a higher speed.

- Dartmouth, Nova Scotia, 00, USA

problem #7

May 122010


  • miles
I like to know if you receive any complains or somebody report problems with accelerator pedal for GMC Envoy (02to05) like loosing power no accident but can cause some thanks [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- St-JÉRÔMe, 00, USA

problem #6

Jul 262007

Envoy 6-cyl

  • 46,000 miles
Right after purchasing. Engine light has been on. Purchased in June/2006, with 40,000miles. 1yr after the RPM gauge quit working, right afterwards, the fuel gauge started messing up, going back & forth, then went out completely, battery/oil gauges are out now. The seat belt lights/airbag lights bing constantly & does not tighten up when put on brakes. When this happens the check gauges light comes on, and at the same time I have difficulty getting it in gear. I am also having trouble setting my cruise control.

- Milledgeville, GA, USA

problem #5

Feb 112008


  • 75,000 miles


The contact owns a 2004 GMC Envoy. When attempting to accelerate, the vehicle hesitates abnormally. The contact took the vehicle to the dealer, but they could not duplicate the failure and provide a remedy. The failure and current mileages were 75,000. Updated 06/03/09 updated 06/04/09.

- Richmond, VA, USA

problem #4

Nov 242008


  • 63,941 miles
I was driving on the highway with the cruise control on. When I tapped the brakes to turn off cruise control, my speedometer was stuck at my cruise control speed of 65. My vehicle came to a complete stop and my speedometer backed off to 45 mph, but would not return to zero. After stopping, then turning onto another highway, my speedometer was still stuck at 45 mph. My cruise control was previously set at the speed limit for the highway at 65 mph and I hit the button to resume cruise control. When I reached my destination, I turned my vehicle off, thinking it would reset to zero without power; yet, it is still stuck at 45 mph and my car is off and parked in my driveway.

- Bedford, TX, USA

problem #3

Apr 292007

Envoy 4WD 6-cyl

  • Automatic transmission
  • 64,000 miles
I was driving in town and my speedometer stopped working at 0. the oil gauge is not working, pegged out at the max and my engine light is now constantly on. These events, particularly the speedometer not working, is a major safety hazard. Not driving at controllable speeds can lead to an accident and death. The parts and labor to fix this problem is $550. While researching this problem on the internet, I've found out that this is a common problem with GMC's in this year. There should be a recall with the cluster unit on 2004 GMC Envoy. GMC should try to prevent deaths that their products may create.

- Mccomb, OH, USA

problem #2

Sep 152006

Envoy 4WD 6-cyl

  • Automatic transmission
  • 55,000 miles
I purchased a 2004 GMC Envoy with approximately 50000 miles on it in may of 2006. About 4 months later, the speedometer started acting slightly erratic, reporting speeds varying by 10-20 mph (I.e. on the highway, keeping up with traffic at 65 mph, the speedometer would report 45 mph or sometimes 80 mph. Over the past few weeks, the problem has gotten much worse, with the speedometer reporting 120 mph at highways speeds, and 50 mph at a stop, sometimes not registering any speed at all (O mph). The cruise control has also stopped working, which I am assuming is related to the speedometer malfunction. I searched online, and apparently there are many other GMC owners with the same exact problem. Please see link below: this is the first GMC car I have purchased and I am dissatisfied with this safety issue. I am a pretty good guess at how fast I am going, however without an accurate speedometer I feel I am taking unnecessary chances. As a realtor, I often have clients in my vehicle and I am concerned for their safety as well. I filed a complaint with GMC, but I was referred to the dealer as there are no current recalls for this problem. The dealer says that this is a $500 fix, and I am concerned as this appears to be a manufacturer defect, based on the number of other consumers with this same issue. I never expected to have an issue this problematic with a vehicle 2 years old. I hope that by reporting this issue, the NHTSA will be able to help me and the other hundreds or thousands of consumers with this safety issue. Thank you for your time.

- Reno, NV, USA

problem #1

May 042006

Envoy 4WD 6-cyl

  • Automatic transmission
  • 34,000 miles
: the contact stated while exiting the off-ramp of the highway at 20-25mph, the check engine and reduced power light illuminated and there was a loss of all vehicle power. Although the engine restarted after several attempts, the vehicle was towed to the dealer for inspection. The dealer determined the accelerator sensor needed to be replaced. Afterwards, the loss of power persisted and the accelerator sensor was again replaced by the dealer as well as the computer. Additionally, the horn intermittently worked, but the horn was not inspected.

- Trinity, NC, USA

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